Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh doi » thanh doi, hanh noi, hang doi
cham duc » cham soc, pham duy, phan duc
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
doi va » hoi va, noi va, dai va
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) ty nang x hoi. hieu ve ((cham duc) or (pham duc)) va hanh doi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang x hoi. hieu ve ((cham duc) OR (pham duc)) va hanh doi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ty nang x hoi. hieu ve ((cham duc) or (pham duc)) va hanh doi va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ty nang x hoi. hieu ve ((cham duc) or (pham duc)) va hanh doi va triet*.